Papers by Keyword: Biomeasurement

Abstract: Infrared-based lie detection experiment methodology can open the human life window (0.6µm-16µm) through which the body spontaneous or active infrared responding images be gathered and analyzed by spectrum scoring in features of geography and computation. These raw images mainly load the indirect physiological, biochemical or direct brain evidences of cognitive lie and truth. Aiming at the mimic play card test, three tests of lie detection based on the medium or near infrared spectrum (NIRS) in four kinds of spectrum analysis are discussed. The instruments include the lock-in phase amplifier of Stanford University, TTM (Thermal Texture Maps) in US patent, and self-made auricular point NIRS (Chinese Jiangsu appraisal certificate No. 1017). The subjects’ signals sampling positions are on glabella, brows, abdomen or auricular point Antitragus No. 2. The spectrum analysis methods utilize the self-built feature extraction algorithms, the wavelet microscopy, and the bispetrum in validities of 92%, 100%, 80% and 80%. The results support the lie-truth law of “truth be the baseline of lie detection in view of brain power” (the statistical finding from review of 3D-MRI lie-detection reports included our work, subjects n = 4) for making foundation to the future lie detection 3D-SoC design.

Abstract: A full field phase detection system for surface plasmon resonance (SPR) bio-sensor is presented. The phase difference variation between s and p polarization resulting from the SPR was detected by the polarization interferometry. In the polarization interferometry, the light reflected from the SPR sensor was divided into four phase quardrature parts by polarization components. By means of an algorithm similar to phase shifting interferometry, the phase distribution of SPR bio-sensor was obtained. We have successfully detected the phase difference variation with 0.07º resolution within 1×1 mm2 full field range. The corresponding detection limit of the refractive index change is about 1×10-7.

Abstract: We address the problem of measuring the refractive index of biological materials. We limit our analysis to the case of colloids and consider the use of common automatic critical-angle refractometers to measure their effective refractive index. We provide rough guidelines to when these refractometers will incur in large errors and alternative techniques should be used.